We can mail you your new passport(s) by regular Dutch mail, at our expense. The Dutch postal services are generally efficient and reliable but mailing is at your risk.
If you prepare a self- addressed return envelope, please use a C5 size envelope, which is 23 x 16 centimeters.
If you would like your passport delivered by registered mail you must provide the necessary Dutch mail bar-coded sticker.

Sample of properly addressed return envelope, Dutch Style: